LVLING AR-15 Rail Mount Carry Handle (12 Slots) Takes standard Weaver rings or STANAG rings. Rail mount locks securely into place atop carry handle, while still allowing for simultaneous use of rear sight See-thru mount seats neatly inside the upper receiver handle and is cured with a knurled thumbnut. Accepts all standard Picatinny 1913 or Weaver optics, such as red dots, scopes and magnifiers Sturdy anodized aluminum construction